用适当的关系副词和关系代词填空
Say all （what） you know.
This is the time at (when)he usually arrives.
I sing the same song (that) he always sings.
The house (where) I lives is very clean.
children like house (which) are painted in different colors.
The boy (who) mother died has grown up.
The man (who) is standing under the tree is Tom's father.